Yoshi, I wnder what he thought was so wrong with him that he had to find you to take his guilt for him. That nonsense about his father is just that. Did he think his dad would live forever? Did he think his dad would want to hear him talking like that? Does he stop to think that you are his father's grandson, and that there is no way in heck you coming could take your grandfather away? thousands of other people died that day, Yoshi. Hundreds of thousands were born. How on earth can he say that you took your grandfather's place, when it could have been Gregor from Yakuts born three minutes before your grandfather died, let us say if we accept that type of thinking.
people who say things like your father are trying to protect themselvesfrom something they feel is very damning about themselves. They feel worthless, theyfeel like they didn't do enough, so they have to find someone else to take that blame because they can't live with it. It's not you. You weren't meant to carry it. Put it down and leave it. Your grandfather's time had come, and he went to rest like we all will. Your dad has something else going wrong with him. HUGGGGGSSSS dear one.